However, Hefner has now told followers on Twitter that he is still confused by what went wrong in their relationship.

"Crystal did an interview with Ryan Seacrest this morning to explain everything, but I still don't have a clue," he wrote. "I didn't see any of this coming, but I'm glad things went wrong before the marriage instead of after. Live & learn (sic)."

Hefner, 85, also revealed that Harris's close friend Anna has been offering her support in the aftermath of the break-up.

"She didn't see this coming either, & she's Crystal's best friend," he added.

Other friends and family who have offered their support to Hefner include his former girlfriends and Girls Next Door stars Holly Madison, Kendra Wilkinson and Bridget Marquardt.